Adhesive applying mechanism



Nov. 2l, 1933. G', sTAuDE Y 1935`Q1731 ADHES IVE APPLYING MECHANISII 26 HIIIIIIIIIIIIIIIIIHIIIIIIIIlil! 2 Filed June 25. 1932 2 Sheets-Sheet. 1

E. G. sTAupE I' 1,935,731

V ADHESIVE APPLYING MECHANISM Filed June 25. 1932 2 sheets-sheet, v2

V as

Patented Nov. 21, 11933 I UNITED s'rATas PATENT oi-Fics 4 16 Claims.

This invention relates to improvements in adhesive applying mechanism and is particularly applicable to the type of machine shown in my application Serial Number 492,441, led October 5 31, 1930. The mechanism may be used generally. and also for applying adhesive to boxboard blanks handled on ordinary paper box machines.

The primary object of the invention is to provide an adhesive-applying mechanism which will successfully handle an adhesive which is very stringy", or tacky, adhesive of such character being necessary to attach moistureproof cellulosic material to box blanks or the like.

The invention consists primarily in the provision of a roll or other moving member, which is moved in synchronism with the adhesive delivery roll in a manner to return'any surplus adhesive Figure 1, including part of a blank-feeding mechto the receptacle.

The invention is particularly valuable for preventing leaks. Ordinarily leaking glue smears the carrying belts, and the work. The least blemish on the work renders it unfit for commercial use. In the case of cartons for various commodities, it is required thatthey be absolutely clean. This requirement for cleanliness is so strict tht those who examine the work use magnifying glasses to detect the blemishes, and any box which has the least smear or blemish is discarded. Great losses are, therefore, occasioned as a result of the escaping surplus adhesive. Moreover, there is about a ten per cent loss of adhesive when the ordinary delivery mechanisms are operating. By the use of the present invention, there is no loss of adhesive, and no vsmearing whatever. r

Features of the invention include: the provision of a moving member which forms a part of the wall of the adhesive receptacle; the location of the member so as to catch or pickup all surplus adhesive; the operation of this member to move 40 in a manner to return any surplus adhesive to the receptacle; the use of a revolving member, arranged below the adhesive supply or delivery roll and the roll to which adhesive is delivered, so that any surplus adhesive may fall by gravity onto it; to so space the roll relative to the other rolls that capillary and surface tension actions are taken advantage of'to positively prevent dripping; to give the member a predetermined directional rotation relative to the adhesive supply or delivery roll; to give this member a predetermined direction of rotation in relation to the adhesive supply roll and to the roll 'to which adhesiveis delivered; to provide an adjustable scraper meme ber which @linges and cooperates with the pick'- 1 up member to form the forward wail -of the, ad#

7 hesive receptacle to have the pick-up or adhesive catch member in constant contact with the adhesive of the receptacle; and generally to provide .i a mechanism which is useful for any-purpose inherent in the disclosure. v

Features of the invention also include. along with the broader ideas of means,Y all details of construction shown in the drawings. or mentioned in the description, or claimed.

Objects, features and advantages of the invention will be set forth in the description of the drawings forming a part of this application, and in said drawings Figure 1 is a top plan of my improved adhesive applying mechanism; Figure 2 is an end view of Figure 1;

Figure 3 is a vertical section on line 3--3 of `anisxn with which-the present adhesive applying device is now used; j 'f5 Figure 4 is anend elevation with the bearings for the movable surplus-intercepting-and-returning means in section; and

Figure 5 is an enlarged detail section illustrating the manner in which the drippings or stringing adhesive is wiped against the moving surface, and is returned to the reservoir. -The entire adhesive vmechanism is herein disposed above the line of feed of the work so as not to interfere with the movement of the material to which the adhesive is to be applied. The work, therefore, passes beneath the gluing mechanism. For this reason the space is necessarily limited, since the diameters of the plate cylinders are determined by the range of the machine.

In the drawings, 2 represents a mechanism for carrrying the article 'to' which the adhesive is to be applied through the machine. Numeral 3 indicates a drum to which the adhesive is delivered, and the drum has a plate 4 for receiving the adhesive. The drum 3 is mounted on a shaft 5. The article to which the adhesive is to be applied is held against the plate 4 by the rolls 6-8.

Numerall indicates'a cross member or spreader to which the deviceis attached. This embodiment includes a` frame 8, attached to the spread er by cap screws 9, fitting in slots 10, and tapped into beveled nuts 1i,-see Figures 2 and 3. The frame can thus be adjusted in direction of feed. This'fra'me '8 carries a reservoir 12 for adhesive 13 alsv `.Mounted within the reservoir 12 isia drum 14 immersed in the adhesive 13. 'I'his drum consti- .tutes an adhesive `supply or delivery means. A 110.

scraper device regulates the flow of adhesive on the drum 14. By means of a lever 16 and thumb screw arrangement 17, the scraper is adjusted. A spring 18 holds the scraper 15 normally in the out or off position. By manipulating the thumb `screw 17, the scraper 15 is caused to assume the proper operative relation with the surface ofthe drum 14.

Ahead of the drum 14, in direction of feed, there is mounted a roller 19, in this embodiment adapted to rotate in clockwise direction, or in a direction opposite that of the drum 14. The

. movable means 14 may take other forms, to perform its function of intercepting, and returning surplus adhesive to the reservoir. The location of the roller 19 is such that it retains the adhesive 13 within the reservoir 12, and, therefore, forms a part of the wall of the reservoir. An adjustable member 20, held in position by cap screws 2l, cooperates with -roll -19 to prevent leakage of adhesive by acting as a scraper. Referring to Figure 3, the roller 19 is positioned directly below the apex formed by the drum 14, and the adhesive-transferring plate 4 of drum 3.

In practice, I find that where the adhesive is very heavy, a Stringing action takes place as the plate 4 leaves the surface of the drum 14, and when the member 19 is stationary, this results in draining off and soon outside dripping occurs to be deposited upon the work. It is, therefore, impracticable to run adhesive that is very thick because it requires too frequent wiping up.

By revolving the roller 19 in a predetermined direction, any drippings will immediately be carried into the reservoir 12, and 'by use of the scraper 20, a clean surface member 1 9 is constantly opposed to the plate 4.

It is to be noted that the rotative wall-forming element of the glue reservoir is located in opposition to the meeting or transfer points of the rolls 3 and 14, so that it acts as a moving shield to intercept and return the surplus adhesive to the reservoir. 'Ihe roll 19 isoperated at a speed greater than the speed of motion of the glue, due to action of gravity, and is varied conformably to the degree of viscosity of the adhesive. In this instance, the` variation may be accomplished by changing the gear ratios.

In order .to drive the movable means 19, there is provided a gear 22, see Figures 1 and 4, meshing with a gear 23, mounted on a shaft 24, which same shaft drives the drum 14. On the outside of the gear 2,3 is mounted a gear 25 which meshes with a gear 26`mounted on the shaft 5 of the feeding machine.

In order to adjust the drurn 14 relative to plate 4, there is provided a set screw arrangement 27, see Figure 2.

Since the distance betweenV the side walls of the adhesive reservoir4 and the length of roller 19 must be the same to maintain an adhesive-tightl joint, and since adjustment is necessaryto maintain such a condition, there is provided, see Figure 4, a threaded bushing 28 having a jamnut one can, with this. adjustment of the threaded' bushing 28, provide a very inexpensive and practical adjustment.

In order to reduce evaporation ofthe adhesive 13, there is provided a cover 30 which is hinged at 3l.

ing means in a manner to return surplus adhesive' to the receptacle.

2. A device of the class described having a re- -ceptacle for adhesive, an adhesive supply roll operatively associated with the receptacle, and a pick-up roll forming a part of the wall of the receptacle and in contact with the adhesive, and disposed to intercept surplus adhesive of the supply roll and return it to the receptacle, and means operating the pick-up roll to return the surplus to the receptacle.

3. A device of the class described having a receptacle for adhesive, an adhesive supply roll operatively associated with the receptacle, a roll to which the adhesive is delivered, and an adhesive pick-up roll forming a part of the wall of the receptacle and in contact with the adhesive, and disposed to intercept surplus adhesive of the supply roll and return it to the receptacle, and means for synchronizing motion of the rolls and directionally moving them in a manner to return surplus adhesive to the receptacle.

4. A device of the class described having a receptacle for adhesive, an adhesive supply roll operatively aociated with the receptacle, a roll to which the adhesive is delivered, and an adhesive pick-up roll forming a part of the wall of n the receptacle and in contact with the adhesive,

a scraper member engaging the pick-up roll and cooperating therewith to complete the wall and to prevent delivery of adhesive by'the roll to a point outside the receptacle, and means operating the rolls ina manner to return surplus adhesive tothe receptacle.

5. A device of the class described having a receptacle for adhesive, an adhesive supply roll operativelyassociated with the receptacle, and an adhesive pick-up roll adjacent the supply roll and forming a part of the wallof the receptaclel and in contact with :the adhesive, and means operating the rolls to cause the surfaces of the supply and pick-up rolls to move in the same directionand toward the receptacle at that point at which their surfaces are nearest together.

' 6. A device of the class described having a receptacle for adhesive, an adhesive supply and delivery roll operatively aociated with the receptacle, aroll to which the adhesive is delivered,

and an adhesive pick-up roll forming a part of the -wall of the receptacle and in contact with the adhesive, a scraper member engaging the pickup roll and cooperating therewith to 'complete the wall and to prevent delivery of-adhesive by the roll rto a point outside the receptacle, said roll being disposed to catch surplus adhesive dropped by gravity from the other mils and to carry it into the receptacle, and means operating the rolls in a manner to return surplus adhesive to the receptacle, the supply and pick-up rolls being moved in the same direction and toward the receptacle at that point at which their surfaces'are nearest together, and said rolls being closely spaced, and

the pick-up roll being placed below the point f of nearest approach of the supply roll and the roll v a v l 1,985,781 ',ceptacle for adhesive. an adhesive 'supply roll.

operatively 'associated with the receptacle, va roll to which the adhesive is delivered, an adhesive pick-uproll forming a part of the wall of the receptacle and in contact with the adhesive. and having portion-opposed to said roll to which the adh sive isdelivered, and a scraper member engaging the pick-up roll to prevent delivery of adhesive by the roll to a point outside the receptacle, and to maintain a clean condition of the roll in that portion which is opposed to the roll to which the adhesive is delivered. 'Y

8. A device of the class described having a receptacle for adhesive, an adhesive supply roll operatively associated with the receptacle, a roll to which the adhesive is delivered, an adhesive pick-up roll in contact with the adhesive, and arranged below said rolls'and close to both, but nearer the supply roll, means for operating the rolls to cause the surfaces of the supply and pickup rolls to move in the same direction and toward the receptacle at that point at which vtheir surfaces arenearest one another, and means for preventingdelivery of adhesive to that portion of the pick-up roll which is opposed to that roll to which'the adhesive is delivered.

9. A device of the class described having a receptacle for. adhesive, an adhesive supply roll operatively associated with the receptacle, a roll to which the adhesive is delivered, an adhesive pickup roll forming apart of the wall of the receptacle and in contact with the adhesive`and a v their surfaces are nearest one another, and to.

scraper memberi engaging the pick-up roll and cooperating therewith to prevent delivery of adhesive by the roll to a point outside the receptacle,

- and to niaintaina clean condition of the roll in that portion which is opposed to the roll to which the adhesive is delivered, the surface of saidpickup roll being near to both of the other rolls, but

4ating the rolls to cause the surfaces of the sup- Ply and pick-up rolls to move in the same direction toward the receptacle at that point at which cause the surfaces of the pick-up-roll and the remaining roll to move in opposite directions at that point at which'their surfaces are nearest one another.

11. A device of the class described having. a

receptacle for adhesive. an adhesive supply roll operatively associated with the receptacle, aroll to which rthe adhesive is delivered, an adhesive 'pick-up rollin contact with the adhesive in the receptacle, and close the other rolls, and means operating the rolls to lcause the surfaces of the supply and pick-up rolls to move in the same direction in that region at which their surfaces are nearest, and to cause the surface of the pickup and the remaining roll to move in opposite directions at that point at which their surfaces are nearest one another.

12. A device of the class described having a receptacle for adhesive, an adhesive supply roll operatively associated with the receptacle, a roll to which the adhesive is delivered, an' adhesive pick-up roll forming a wall of the receptacle and in contact with the adhesive, and close to the other rolls, and means for operating the rolls to cause the surface of the supply and pick-up rolls to move in the same direction in that region at which their surfaces are nearest to one another, and to cause the surface of the pick-up roll and the remaining roll to move in opposite directions in that region at which their surfaces are nearest.

13. A device for handling tacky, stringy adhesive used in attaching moisture-proof cellulosic material to box blanks, comprising a receptacle containing a supply of adhesive, first and second rolls both in contact with the supply of adhesive, a third roll adjacent said rolls and to which the ating the rolls to cause the approximate surfaces of the first and second rolls to move toward the glue supply.

14. A device for handling tacky, stringy adhesive used in attaching moisture-proof cellulosic material to box blanks, comprising a receptacle for adhesive, first and second rolls forming one side of the glue receptacle and both in contact with the supply of adhesive, a third roll adiacent said rolls and to whichthe iirst roll delivers adhesive, and means for operating the rolls to cause the approximate surfaces of the first and second to move towards the glue supply.

15. A device for handling tacky, stringy adhesive used in attaching moisture-proof cellulosic material to box blanks comprising a receptacle for adhesive, first and second rolls forming one side ofthe glue receptacle and both in contact with the supply of adhesive, a third roll to which the first roll delivers adhesive and having its periphery adjacent the second roll, with the delivery point above the second roll, and means for operating the rolls to cause the approximate surfacesV of the rst andthird rolls to move downwardly and the approximate surfaces of the first and second to-move towards the glue supply.

16. A device of the class described comprising a receptacle containing a supply of adhesive, first and second rolls both in contact with the supply of adhesive, a third roll adjacent the rolls and to which the first roll delivers adhesive, the second roli'moving downwardly at the point of contact with the third roll, and moving toward the scc- '135 ond roll and downwardly toward the receptacle. EDWIN G. s'rAUDE.

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